Zhou KY, Deng LJ, Luo SY, Wang QX, Fang S. Expression of Early Growth Response 3 in Skin Cancers.
Appl Immunohistochem Mol Morphol 2024;
32:169-175. [PMID:
38478384 DOI:
10.1097/pai.0000000000001191]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 02/13/2024] [Indexed: 04/05/2024]
Abstract
OBJECTIVE
To assess the expression of early growth response 3 (EGR3) in normal skin and different types of skin tumors: cutaneous squamous cell carcinoma (cSCC), basal cell carcinoma (BCC), melanoma (MM), and cutaneous adnexal tumors containing sebaceous carcinoma (SC), trichoepithelioma (TE) and clear cell hidradenoma (CCH).
BACKGROUND
EGR3, expressed in multiple organs, including skin, plays an important role in cell differentiation and tumor growth. Previous studies have shown that EGR3 suppresses tumor growth and is downregulated in various malignancies. However, its distribution in normal skin and its expression especially in skin tumors have not been studied.
MATERIALS AND METHODS
Samples of normal cases (n = 4), cSCC (n = 12), BCC (n = 12), MM (n = 12), SC (n = 4), TE (n = 4), and CCH (n = 4) were collected from patients treated in our department between 2018 and 2023. Immunohistochemistry was used to investigate the expression of EGR3. The results were analyzed with the description of the staining pattern and the histochemical score.
RESULTS
Immunohistochemical staining showed that EGR3 was uniquely expressed in normal skin in the granular layer and upper part of the stratum spinosum, as well as in sebaceous glands and hair follicles, but not in sweat glands. In skin cancers, BCC, SC, and TE showed positive EGR3 staining, whereas cSCC, MM, and CCH were negative.
CONCLUSIONS
EGR3 has a specific expression pattern in normal skin and in skin tumors, which is important for the differential diagnosis of skin tumors, in particular for cSCC and sebaceous gland carcinoma.
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